Ulnar nerve compression usually occurs around the elbow joint, a condition called cubital tunnel syndrome. Much less often, compression can occur at the wrist, a condition sometimes known as Guyon ...

Carpal tunnel syndrome in the presence of anomalous median to ulnar nerve ... Median nerve stimulation at the elbow evokes a thenar muscle action potential (MAP) with an initial positive deflection ...

If your outer wrist feels sore and achy, you might chalk it up to arthritis. But that discomfort could be ulnar wrist pain, which affects the side of the wrist closest to the pinky finger.